/*
 * Copyright (c) 2012, Metron, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Metron, Inc. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL METRON, INC. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package com.metsci.glimpse.util.io.datapipe;

import java.io.DataInputStream;
import java.io.IOException;


/**
 * An implementation of {@link ReadableDataPipe} that uses standard io (not nio).
 *
 * @author hogye
 */
public class ReadableDataStream implements ReadableDataPipe
{
    private final DataInputStream _stream;

    public ReadableDataStream(DataInputStream stream)
    {
        _stream = stream;
    }

    public boolean readBoolean() throws IOException
    {
        return _stream.readBoolean();
    }

    public byte readByte() throws IOException
    {
        return _stream.readByte();
    }

    public double readDouble() throws IOException
    {
        return _stream.readDouble();
    }

    public float readFloat() throws IOException
    {
        return _stream.readFloat();
    }

    public int readInt() throws IOException
    {
        return _stream.readInt();
    }

    public long readLong() throws IOException
    {
        return _stream.readLong();
    }

    public short readShort() throws IOException
    {
        return _stream.readShort();
    }

    public String readString() throws IOException
    {
        // Note: do not use DataInputStream.readUTF for compatibility with channel implementation
        byte[] bytes = new byte[_stream.readInt()];
        _stream.readFully(bytes);

        return new String(bytes, "UTF-8");
    }

    public byte[] readByteArray(byte[] bytes) throws IOException
    {
        _stream.readFully(bytes);
        return bytes;
    }

    public boolean[] readBooleanArray(boolean[] values) throws IOException
    {
        byte[] values2 = readByteArray(new byte[values.length]);

        for (int i = 0, ni = values.length; i < ni; i++)
        {
            values[i] = values2[i] != 0;
        }

        return values;
    }

    public short[] readShortArray(short[] values) throws IOException
    {
        for (int i = 0, ni = values.length; i < ni; i++)
        {
            values[i] = _stream.readShort();
        }

        return values;
    }

    public int[] readIntArray(int[] values) throws IOException
    {
        for (int i = 0, ni = values.length; i < ni; i++)
        {
            values[i] = _stream.readInt();
        }

        return values;
    }

    public long[] readLongArray(long[] values) throws IOException
    {
        for (int i = 0, ni = values.length; i < ni; i++)
        {
            values[i] = _stream.readLong();
        }

        return values;
    }

    public float[] readFloatArray(float[] values) throws IOException
    {
        for (int i = 0, ni = values.length; i < ni; i++)
        {
            values[i] = _stream.readFloat();
        }

        return values;
    }

    public double[] readDoubleArray(double[] values) throws IOException
    {
        for (int i = 0, ni = values.length; i < ni; i++)
        {
            values[i] = _stream.readDouble();
        }

        return values;
    }

    public void close() throws IOException
    {
        _stream.close();
    }

    public DataInputStream getInputStream()
    {
        return _stream;
    }
}
